Cold work tool steel
| Steel type | Equivalent JIS steel | Hardening and annealing hardness | Features | Application example |
| K3M | SKS93 | 58 to 63HRC | Carbon-tool steel | Press dies, blades, gauges |
| KS3 | SKS3 | 58 to 63HRC | General-purpose cold- tool steel | Press dies, blades, gauges |
| FH5 | 55 to 61HRC | Flame-hardened steel | Press dies | |
| KRCX | 50 to 60HRC | Highly
machinable general-purpose cold- tool steel Flame-hardened steel |
Metallic
molds, mold parts, jigs, press-dies |
|
| RC55 | 54 to 56HRC | Highly machinable pre-hardened steel | Press-dies | |
| KD11 | SKD11 | 58 to 61HRC | General-purpose cold- tool steel | Press-dies, rolls, gauges |
| KD11S | 58 to 61HRC | Highly
machinable general-purpose cold- tool steel Flame-hardened steel |
Press-dies, rolls, gauges | |
| KD12 | SKD12 | 58 to 61HRC | High-tenacity cold-tool steel | Molds for plastic, blades |
| KD31 | 56 to 61HRC | Impact-resistant
high-grade cold-tool steel |
Blades | |
| KPS6 | 58 to 60HRC | Corrosion-proof,
wear-proof cold-tool steel |
Resin forming machine parts |
Recommended!
The KD11S with remarkably improved machinability by proper carbide form control without deteriorating the basic performances of the SKD11 will comply with users expectations.
“If we can only engrave molds as hard as HRC55 directly!” Koshuha complies with such a customers dream. The RC55 is new pre-hardened steel that enables steel as hard as HRC55 to be machined efficiently at low cost without the need of special cutting tools. It requires no thermal processing and offers improved mold precision and reduces the manufacturing time.
The KRCX is multi-purpose cold-tool steel that remarkably improves the machinability, tenacity, and hardening performance and may be hardened in the same conditions as the SKD11 and SKS3. It also demonstrates superior performance as flame-hardened steel with high tenacity and high machinability.
The KPS6 is high-tenacity tool-steel with improved corrosion resistance and wear-resistance suitable to the screws for plastic-forming machines.
Positions of cold-tool steel characteristics
